.about {
  overflow: hidden;
}

.about .list {
  width: 100%;
  height: 100vh;
}

.about .item {
  float: left;
  position: relative;
  height: 100%;
  font-size: 12px;
  color: #e2e0e0;
  opacity: 1;
  transition: 0.7s 0.2s;
}

.about .item:nth-child(1) {
  width: 20%;
}

.about .item:nth-child(2) {
  width: 30%;
  background: url("http://www.bufantec.com/site/sheying/images/about1.jpg")
    no-repeat center;
  background-size: cover;
}

.about .item:nth-child(3) {
  width: 50%;
}

.about .item .top-box {
  height: 55%;
  box-sizing: border-box;
  padding: 40px 20px 0 135px;
  opacity: 1;
  transition: 0.7s 0.2s;
}

.about .item .top-box .top-text-cn {
  color: #fff;
  font-size: 14px;
  line-height: 40px;
}

.about .item .top-box .top-text-en {
  color: #fff;
  font-size: 10px;
  margin-top: 30px;
  line-height: 16px;
}

.about .item .top-box h1 {
  height: 50px;
  width: fit-content;
  border-bottom: 2px solid #fff;
  font-size: 24px;
  margin-bottom: 65px;
}

.about .item .bottom-box {
  background-color: #f00;
  height: 45%;
  opacity: 1;
  transition: 0.7s 0.2s;
}

.about .item .bottom-box img {
  display: block;
  float: left;
  width: 49.5%;
}

.about .item .bottom-box .text-holder {
  float: right;
  color: #fff;
  padding-left: 30px;
  padding-top: 130px;
  box-sizing: border-box;
  width: 50.5%;
}

.about .item .bottom-box .text-holder .bottom-text-cn {
  font-size: 14px;
}

.about .item .bottom-box .text-holder .bottom-text-en {
  font-size: 10px;
  margin-top: 25px;
}

.about .list .item.beforeIn {
  opacity: 0;
  transform: translateY(-500px);
}

.about .list .item .top-box.beforeIn {
  opacity: 0;
  transform: translateX(-1000px);
}

.about .list .item .bottom-box.beforeIn {
  opacity: 0;
  transform: translateX(500px);
}

@media (max-width:1024px){
  .title-en {
    display: block;
    position: static;
    font-size: 20px;
    transform: rotate(0deg);
    transform-origin: 0 100%;
  }

  .title-cn {
    position: static;
    display: block;
    font-size: 14px;
    width: 100%;
  }

  .about{
      padding-bottom: 50px;
  }

  .about .list {
    width: 80%;
    height: fit-content;
    margin: 0 auto;
    margin-top: 60px;
  }

  .about .list .item {
    float: none;
    position: relative;
    width: 100%;
    font-size: 12px;
    color: #e2e0e0;
    opacity: 1;
    transition: 0.7s 0.2s;
    text-align: center;
    margin-top: 20px;
  }

  .about .item:nth-child(2){
      height: 400px;
      background-position: 0 0;
  }

  .about .list .item.beforeIn {
    opacity: 1;
    transform: translateY(0px);
  }

  .about .list .item .top-box.beforeIn {
    opacity: 1;
    transform: translateX(0px);
  }

  .about .list .item .bottom-box.beforeIn {
    opacity: 1;
    transform: translateX(0px);
  }

  .about .item .top-box {
    height: 55%;
    box-sizing: border-box;
    padding: 0px;
    transition: 0.7s 0.2s;
    margin-bottom: 20px;
  }

  .about .item .top-box h1 {
    height: 50px;
    width: fit-content;
    border-bottom: 2px solid #fff;
    font-size: 16px;
    margin: 0 auto;
    margin-bottom: 20px;
  }

  .about .item .bottom-box img {
    float: none;
    width: 100%;
  }
  .about .item .bottom-box .text-holder {
    float: none;
    color: #fff;
    box-sizing: border-box;
    width: 100%;
    padding: 10px;
  }

  .about .item .bottom-box .text-holder .bottom-text-cn {
    font-size: 14px;
  }

  .about .item .bottom-box .text-holder .bottom-text-en {
    font-size: 10px;
    margin-top: 10px;
  }
}
